Contact: Diana Yates
University of Illinois at Urbana-Champaign
Caption: Both of these African clawed frogs are genetically male, but lifelong exposure to the herbicide atrazine transformed the frog on the bottom to female. The frog reproduced with normal males twice.
Credit: Tyrone Hayes
Usage Restrictions: Photo may be used only to accompany stories about the research described in this news release. Please credit: Tyrone Hayes.
Related news release: Report: Herbicide atrazine spurs reproductive problems in many creatures